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Yield

2018-07-16

Heat in the Heartland: Crop Yield and Coverage Response to Climate Change along the Mississippi River

Farmers may adapt to climate change by substituting away from the crops most severely affected. In this paper we estimate the substitution caused by a moderate change in climate in the US Midwest. We pair a 10-year panel of satellite-based crop coverage with spatially explicit soil data and a fine-scale weather data set. Combining a proportion type model with local regressions, we simultaneously address the econometric issues of proportion dependent variables and spatial correlation of unobserved factors.

2008-06-19

Determinants of Soil Capital

Explaining soil capital facilitates a better understanding of constraints and opportunities for increased agricultural production and reduced land degradation. The diversity in farmers’ soil capital, production strategies, and general farming systems (including conservation investments) points to the value of internalizing these aspects in the formulation of the government’s policies and extension advice on sustainable agriculture.

2008-06-19

Production Function Analysis of Soil Properties and Soil Conservation Investments in Tropical Agriculture

This paper integrates traditional economic variables, soil properties, and variables on soil conservation technologies to estimate agricultural output among small-scale farmers in Kenya’s central highlands. The study finds that integrating traditional economics and soil science is invaluable, especially as omitting measures of soil capital can cause omitted-variable bias. The central policy implication is that while fertilizers are generally beneficial, their application is a complex art, and more is not necessarily better.